The Peacock Room at Castello di Sammezzano in Reggello, Tuscany, Italy.
Atop a hill in a Tuscan oak tree grove, you’ll find the abandoned Sammezzano Castle. The derelict building, built in 1605 with funds from Spanish nobility, features intricate Moorish designs and a breathtaking assortment of patterns and colors. Inside, the words “Non Plus Ultra” — meaning “nothing further beyond” in Latin — stands out above an archway. It alludes to a warning sign in Greek Mythology that demarcated the edge of a flat world for explorers; perhaps communicating the architect’s vision to take visitors literally out of this world with jaw-dropping interiors.